pitrou commented on code in PR #15244:
URL: https://github.com/apache/arrow/pull/15244#discussion_r1071045128


##########
cpp/src/parquet/properties.h:
##########
@@ -199,7 +199,8 @@ class PARQUET_EXPORT WriterProperties {
           pagesize_(kDefaultDataPageSize),
           version_(ParquetVersion::PARQUET_2_4),
           data_page_version_(ParquetDataPageVersion::V1),
-          created_by_(DEFAULT_CREATED_BY) {}
+          created_by_(DEFAULT_CREATED_BY),
+          integer_annotate_decimal_(false) {}

Review Comment:
   Hi,
   Some belated comments:
   * Maybe it's because I am not a native English speaker, but I have a hard 
time understanding what "integer annotate decimal" means. Is "annotate" a word 
here?
   * I agree that the defaults should remain false for the time being.
   * While enabling this does allow for a more compact representation, 
compression might at least partially alleviate that (though unfortunately 
FIXED_LEN_BYTE_ARRAY doesn't seem to support any of the delta encodings)
   



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